MINOR: quic: add config parse source file

Create a new dedicated source file for QUIC related options parsing on
the bind line.
diff --git a/src/cfgparse-quic.c b/src/cfgparse-quic.c
new file mode 100644
index 0000000..34ec729
--- /dev/null
+++ b/src/cfgparse-quic.c
@@ -0,0 +1,9 @@
+#include <haproxy/api.h>
+#include <haproxy/listener.h>
+#include <haproxy/proxy-t.h>
+
+static struct bind_kw_list bind_kws = { "QUIC", { }, {
+	{ NULL, NULL, 0 },
+}};
+
+INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);